We've seen yoyo-powered MP3 players, MP3 massagers, even MP3 knobs . Now comes the Groove Glove, a DJ deck with its own onboard speaker that sits on your hand. Slide it on, and you can start pumping up the volume with four sound controls for adding scratches, sample blasts and rap riffs with your fingers. A demo button lets you play along. Michael Jackson who? Step aside. Here comes another one-gloved wonder to get down with the homies.